GSM Door Entry Systems
GSM (Global System for Mobile Communications) Door Entry Systems are an excellent solution where it is not possible for a hard wired door entry system to be installed. Telephone technology is used instead and is extremely useful where the distance between a gated entrance and its main building is too great.
GSM uses a SIM card telephone number and service provider enabling it to connect with any telephone. For example, if there is an alarm system in the house with a GSM system, once an intruder breaks into the property the alarm system will automatically call to either the customer or the police, depending on where the GSM is forwarded to. GSM door entry systems are also extremely popular the world over and enable entry into a complex or property via your mobile phone or landline.